Process for producing catalytic agents for reduction or hydrogenation purposes



UNITED STATES PATENT OFFICE.

AUGUSTIN RADISSON AND PAUL BERTEON, OF LYON, FRANCE; SAID RADISSON ASSIGNOB OF HIS RIGHT TO SOCIETE DE STEABINERIE ET SAVONNERIE DlE LYON, 0F LYON, FRANCE.

PLOGESS FOR PRODUCING CATALYTIC AGENTS FOR REDUCTION OR HYDROGENATION' PURPOSES.

No Drawing.

To all whom it may concern.

Be it known that we, AUGUs'rIN RADIssoN and PAUL BERTHON, both residing at Lyon,

metals, others utilize the catalytic properties of certain oxids.

It is also known that if during the reduction of certain oxide or certain metallic salts a suboxid appears to be temporarily formed, the final result of such reduction is invariably the metal. It is admitted, on the other hand, that the catalytic properties of a reduced metal are increased proportionately with the low temperature at which it was reduced.

It seems, therefore, logical to endeavor to obtain the whole of the catalyzer in its most stable and most active form.

According to the present invention an oxid or salt of a metal I (nickel, cobalt, manganese, co per, etc.) is reduced in a neutral liquid me ium having a high boiling point, such as solid paraffin, petroleum jelly, heavy petroleum oil etc., in the presence of a trace of free fatty acid.

Practically, for instance, oxid of precipitated nickel, pure and dry, is held in suspension in melted paraflin, and a slight proportion of stearic acid is added to the mixture in such manner that its acidity does not exceed 0.3 per cent. of the total weight of the mixture. The acid lowers the required working temperature.

The reagents are kept during the operation at the temperature of 250 and perfect contact between the gas and the mixture of oxid with the arafiin, or the like, in melted condltion is insured by suitable means. The liquid or medium is maintained, during'the preparation, in a 1i uid Specification of Letters Patent.

Patented May 3, 1921.

Application filed October 29, 1919. Serial No. 334,381.

is completely in the metallic state. It is then present in the form of an absolutely impalpable black powder. It is dried hot to separate it from the parafiin, and cakes are thus obtained containing a very large proportion of nickel which is never less than 90%, the balance or 10% being formed by suboxid or oxid of nickel. Under this coverlng of paraffin the catalyzer is indefinitely preserved without losing any of its efiiciency. What we claim as our invention and desire to secure by Letters Patent of the United States is 1. A process for producing I catalytic agents for reduction or hydrogenation purposes, consisting in reducing a metallic oxid in a mixture of a neutral liquid having a high boiling point and a small proportionof free fatty acid, the said mixture being maintained in a liquid state by heat during the reduction, and constantly agitated by passingla current of h drogen gas through it.

2. T e process 0 producing catalytic agents for reductionor hydrogenation purposes, consisting in reducing an oxid or a salt of a catalytic metal in a medium composed of a chemically neutral saturated body not containing oxy en in its composition and a slight proportion of stearic acid; the said medium being maintained in a liquid state by heat during the reduction, and constantly agitated by passing hydrogen gas throu h 1t.

3. he herein described process of producing catalytic agents for reduction or hydrogenation purposes; consistm in reducing an oxid or a salt of a cata ytic metal in a heated medium composed of petroleum jelly and a slight proportion of stearic acid; the said medium being maintained in a liquid state during the process at a temperature of a proximately 250, and constantly agitated by passing a current of hydrogen gas through it; then separatin the cataytic agent in the form ofa ne owder from t e solution and finally drying the se arated agent w 'ile hot.

n witness whereof we have signed this specification in the presence of two witnesses.

AUGUST-IN. RADISSON. PAUL BERTHON.

- Witnesses:

- JEAN Gnmmm, LOUIS Esomll. 

